Window shade



Feb. 20, 1934. s SNYDER 1,948,432

WINDOW SHADE INVEAIT Samuel 572 J61 W Atto y Feb. 20, 1934. 5 ER 1,948,432

WINDOW SHADE Filed Dec. 9. 1932 2 Sheets-Sheet 2 INVENTOR Attorney Patented Feb. 20, 1934 1,948,432

WINDOW SHADE Samuel E. Snyder, Brooklyn, N. Y.

Application December 9, 1932, Serial No. 646,542, and in Canada December 17, 1931 3 Claims. (Cl. 156-427) This invention relates to new and useful im- Fig. 7 is an end view of the spring roller and provements in window shades and more particusupport therefor. larly to spring-actuated shades and an object Fig. 8 is a perspective view of the same. of the invention is to provide a novel arrange- Fig. 9 is an alternative design of trunnion. ment, whereby a shade of adjustable length may Referring more in detail to the drawings in 69 be suspended at any desired position in relation which similar reference numerals designate the to the window opening in a manner to provide corresponding parts: privacy and at the same time admit light and air It will be seen that the window 15 is normally from the upper part of the window. covered by the shade 16 produced of suitable,

A further object is to provide a suitable means, tractable material 17 attached to the spring roller 65 whereby a spring roller and its attached shade 18 in a manner to normally wind thereon by the may be operably borne and in movable relation tension of the spring. The spring roller 18 and its to the window opening. attached shade is operably suspended by the A still further object is in the provision of a bar 19 having end members 20 secured on the stationary spring roller adapted to actuate the said bar by set screws a, said end members havmovable spring roller and its attached shade in ing depending ears 21 and 22. On the ear 21 is relation to the Window opening and at the same produced a round protrusion 23 adapted to bear time having sufiicient tension not to be effected by the rotatably orifice, whilst in the ear 22 is a recthe tensioning of the spring in the shade roller. tangular protrusion 24 adapted to engage the 20 A yet further object is in the provision of the non-rotatable orifice. The alternate design novel winding cones which coil and uncoil the shown in Fig.9providesathreaded trunnion havfiexible connections from the shade roller device ing a screw driver slot in the end thereof as a in a manner to equalize the leverage upon the more convenient means of releasing the shade roller in relation to the spring tension of the roller. These protrusions are projected inwards 26 roller. into the roller thus presenting a flat outside surso Another object of the invention is to provide face on the members 20 which will provide a great an attachment for governing the rotation of the dva Where Curtains p s are used on supporting roller of the window shade. the window.

Another object of this invention is to provide a The Shade 16 is Suspended in adjustable 30 device or the character described which, when la i n t h Window p nin 15 by lin n c ds 26 attached to the conventional type of spring roller t l e w c r a ta d to t e t t y will serve to govern the rotation of the roller roller 7 i a su a m nn a 8 and d p d when winding the shade suspending means t r m to engage t yes 9 which p t thereon. from the shade bearing bar 20.

35 Another object of this invention is to provide The stationary spring o e '1 is r tata y a device of the character described, which will borne y the common a k s 0 which are p ll w fr unwinding of th Shade suspending vided with cars 31 adapted to receive the rotatmeans able trunnion 32 and non-rotatable trunnion 33 Other objects and many of the attendant adin cqmmvn form- Mounted upon each end 40 vantages will be readily appreciated as the inventremlty of the roller is a mber 34 having the tion becomes better understood from a consideraform of frustum of hel'eafber termed tion of the illustrative embodiments of the same cone Whlch .cones .have 391ml grooves or threads and for which purpose such descriptive drawings 35 prpduced m Then extenor 5.1mm and adapted have been hereto apnended wherein: to 0011 and uncoil the cords 26 in even, spaced turn Fig 1 is an elevation of f Window and Shade in operation. Each of these cones 34 15 also provided with an integral annular flange 35a which is having h mventmn attached ,thereto' preferably of dimensions equal to the largest di- 2 15 an [enlarged qe View of the statlon' ameter of the cone and adapted to prevent overary roller having the winding cone and rotation winding of the cords 26 into the trunnions and 50 governing device attached thereto. consequently jam Fig. 3 is a detailed view of the spring roller. The cord 36 is secured to the member 37 on the Fig. 4 is a longitudinal sectional view through bar 19 the said member 3'7 having a curved porthe governing device. tion 37a projecting from the same. When the Fig. 5 is a cross sectional view of the same. cord is pulled to lower the shade the curved 55 Fig. 6 is an end view of the stationary roller. portion 37a will rest on the rolled shade 16. This obviates the necessity of using large diameter tubes when the device is used on a wide window.

The cord 38 is secured to the eye 39 of the filler stick 40 at the free end of the shade material 17 in a manner to adjust the shade over the desired space of the window.

With this novel arrangement, it is obvious any desired portion of the window opening 15 may be covered, and that when the shade 16 is at the top of the window opening 5 and the tension spring of roller 27 is in relatively unwound condition, the cords 26 are then engaging the cones 35 at their smaller diameter and nearer the axis of the roller. Therefore, the leverage is relatively less in proportion to the strength of the spring. Again, when the shade 16 is at the bottom of the window opening and the tension spring of roller 27 is in relatively wound up condition, then the cords 26 are engaging the cones 35 at their larger diameter and further from the axis of the roller and the leverage is greater in proportionate relation to the strength of the spring. Accordingly by this novel cone arrangement, the leverage is equalized in proportion to the variation of the spring tension of roller 27.

Attached to the stationary roller 27 is the rotation governor which comprises two hard rubber collars 41 over which tube 42 is mounted and secured by clamps 43 in such a manner that collars 41 constitute ends for the tube 42. One of the clamp 43 is provided with an arm 44 of soft metal, which arm is deflected to lie adjacent the window moulding 45 and be secured thereto by screws 46.

A tongue 47 is punched outwardly from the tube 42 intermediate the ends thereof, in a manner to constitute a fissure 48.

A collar 49 is mounted around the spring roller 27 within the tube 42 in frictional contact therewith, and a hook 50 is connected thereto 'by spring 51. The tension of the spring 51 causes the said hook to lie against the collar 49 when the spring roller 27 is still. The collar 49 is provided with a friction adjustment which comprises a screw 52 threaded into the said collar and bearing against a thin metallic plate 532a and causing the said plate to bear against the spring roller 27. An orifice 53 is provided in the tube 42 to permit the same to be adjusted.

The collar 49 is retained centrally in the tube by means of two U-shaped guide members 54 secured in the spring roller 27. This serves to keep the hook 50 in alignment with the fissure 48.

In operation it will be seen that the tube 42 and collars 41 are held in fixed relation to the window-moulding 45 with the spring roller 27 extending therethrough. As the shade suspending means is unwound from the roller 27 causing its rotation, the tight fitting collar 49 also rotates with its attached hook 50 in such a direction that the hook will not engage with the fissure 48.

When the shade suspending means is being wound up, by the action of the spring roller, the hook will gradually leave its position against the collar 49 due to centrifugal force and should the speed of rotation be great enough the hook 50 will engage the fissure 48 in a manner to hold the collar 49 rigid to the stationary tube 42 when the collar 49 will frictionally check the rotating speed of the roller and thereby serve to prevent damage to the roller shade.

It will be obvious from the foregoing description that this invention is a great improvement in controlling means for window shades and while the preferred embodiment has been disclosed, yet it is to be understood that minor changes in the details of construction and combination may be resorted to within the scope of what is claimed without departing from the spirit of the invention.

I claim:

1. In combination with a spring roller for window shades, a governor comprising a tube loosely mounted on said roller in spaced relation thereto, means fixedly securing said tube to the window moulding. a fissure formed in said tube, a collar mounted on said roller within said tube, adjusting means carried by said collar for securing the collar in frictional contact with the roller, and a hook suspended from said collar for engagement with the fissure of said tube through the action of centrifugal force upon rotation of said collar.

2. In combination with a spring roller for window shades, a governor comprising a tube loosely mounted on said roller in spaced relation thereto, means fixedly securing said tube to the window moulding, a fissure formed in said tube, a collar mounted on said roller within said tube having frictional contact with the roller, and a hook suspended from said collar adapted to normally lie against said collar, said hook being movable through the action of centrifugal force into engagement with the fissure of said tube upon rotation of the roller.

3. In combination with a spring roller for window shades, a governor comprising a tube loosely mounted on said roller in spaced relation thereto, means fixedly securing said tube to the window moulding, a fissure formed in said tube, a collar mounted on said roller within said tube, a set screw carried by said collar for adjusting the collar in frictional contact with the roller, and a hook suspended from said collar for engagement with the fissure in said tube through the action of centrifugal force upon rotation of the roller.

SAMUEL E. SNYDER. 

